01 -
Preheat your oven to 220°C (425°F).
02 -
Fill a large pot with water and bring to a boil. Meanwhile, slice the top and bottom off each onion and remove the peel. Using a sharp knife, slice each onion halfway through lengthwise, creating a slit that reaches the middle to facilitate layer separation after boiling.
03 -
Once water is boiling, add the onions and simmer for 10-15 minutes until layers can be easily separated but not overcooked. Drain in a colander and allow to cool for 15-20 minutes while preparing the filling.
04 -
Heat olive oil in a large frying pan over medium heat. Add garlic, shallot, ground beef, and Italian sausage. Cook while breaking the meat into small pieces with a wooden spoon.
05 -
When meat is nearly browned, add salt, pepper, crushed fennel seeds, dried basil, dried oregano, onion powder, and red pepper flakes. Continue cooking for an additional minute to bloom the spices.
06 -
Add the rinsed rice, fresh thyme, chopped tomatoes and chicken broth to the meat mixture. Cook on medium heat, stirring frequently, until broth is absorbed and rice is partially cooked (approximately 6-7 minutes). The rice will finish cooking in the oven.
07 -
Remove from heat and stir in the chopped Italian parsley.
08 -
In a bowl, combine strained tomatoes, chicken broth, and salt to taste. Adjust seasoning based on whether you're using salted or unsalted broth.
09 -
Spread a thin layer of tomato sauce on the bottom of a large oven-safe pan or deep baking dish. Gently separate the onion layers. Place about 2 tablespoons of filling in the center of each layer and roll carefully, ensuring the filling stays intact. Position stuffed onions seam-side down in the prepared dish, fitting them snugly together.
10 -
Pour remaining tomato sauce over the stuffed onions. Cover with foil and bake for 30-35 minutes. Remove foil and continue baking for 20-30 minutes more until onions are soft, slightly caramelized and the dish is bubbling.
11 -
For extra caramelization, broil for the final 2 minutes. Remove from oven and let rest 10 minutes before serving.
12 -
Finish with a drizzle of balsamic glaze, a light stream of olive oil, and a sprinkle of fresh parsley.